Best Budget Gear Oil For Tundra

[AGuyFromNC]

I'm closing in on the next diff fluid service interval for my 2020 Tundra. This is a daily driver with a fair bit of light towing (under 5K lbs).

I've been contemplating going with a budget-friendly product this time and subscribing to the idea that new/clean/budget gear oil is better than old/used/expensive gear oil.

I'd like your opinion on which of the following would be the best option for an approx. 40-50K mile run. I need approx. 6 qts to do front and rear. I last used Valvoline Syn flex bags.

Synthetic options:
1. Ultra1Plus Syn 75w90 GL5 (Tractor Supply $18 per gal or $9 per qt) - This one is intriguing to me....I can easily pump the approx. 4 quarts into the rear diff so the gal seems most economical of all synthetic options. I just haven't heard of this brand before.
2. Supertech Syn 75w90 GL5 (Walmart $10.42 per qt)
3. Valvoline Full Syn 75w90 GL5 Flex bag (Amazon/Walmart $15.48 per qt)
4. Eneos Syn 75w90 GL5 (Napa $12.99 per qt)

Conventional options:
5. Valvoline Daily Protection 75w90 Conv (Amazon $12.49 per qt)
6. Supertech 80w90 Conv (Walmart $5.44 per qt)

Any others that I'm missing that's in this range? Thoughts?

 

[CarbonToast]

Rockauto has more budget options, the valvoline conventional is ~$6 / qt but the ST at $5.44 seems like the cheapest option.

If you are trying to save money, don't bother changing the front diff. It doesn't spin unless you're in 4wd.

 

[dubber09]

How about Mobil 1 Delvac gallon jug? Should be under $40 per gallon. If anything, may be cheapest synth oil you are comfortable with.

 

[AGuyFromNC]

I haven't checked Rockauto. Good call.

More like I feel like I may be wasting money on a more expensive option. There's so many vehicles running down the road without any diff fluid changes in 200K plus miles and still going.

 

[Lubener]

I haven't checked Rockauto. Good call.

More like I feel like I may be wasting money on a more expensive option. There's so many vehicles running down the road without any diff fluid changes in 200K plus miles and still going.

Your last sentence says it all. Go with the conventional Supertech. Why overpay for just a name with no added benefits?

 

[Slick3914]

This is a good deal on Mobil 1

https://www.amazon.com/Mobil1-10436...&s=automotive&sprefix=,automotive,112&sr=1-17

 

[JavierH19]

I believe it's a limited slip so it must have the additive but you'll have to check. If it's electronic or not locking at all it doesn't need it. But if limited slip whatever you get it must say it has the additive if you don't want it to function badly when it tries to engage.

 

[AGuyFromNC]

Is there a difference in the Valvoline flex bag full synthetic and the plastic bottles labeled synpower full synthetic?

 

[barkingspider]

Supertech ftw.

 

[meep]

Do you know if your truck is limited slip? SR5 typically isnt, TRD typically is. You’ll need to factor in a tube of additive, in my experience it will need it even if the fluid you’re adding claims to have it. In my 2006 tundra I used amsoil severe gear - 110 weight, and it needed around 1/2 the additive in addition to what was already in the fluid. I determined by driving tight circles in the parking lot and adding 1/4 tube until it stopped notably binding.

 

[Marcozi]

I'm am wondering why you want to skimp on lubes that are vital to truck.

 

[hrv]

I'm am wondering why you want to skimp on lubes that are vital to truck.

Me too. Its not like you change it every other week...

 

[Kira]

Me too.

Me three.
But who doesn't like a good deal on a product which comes from an industry which appears to have absolute "minimum or better" standardizations. In other words, if you select a proper product, you can't go wrong.
That $18 gallon intrigues me too.
Ha-ha, get it before we're forced onto the 'bitcoin standard".

 

[pbm]

Your last sentence says it all. Go with the conventional Supertech. Why overpay for just a name with no added benefits?

I'm pretty sure the Supertech says 'Full Synthetic' on the bottle that's $10.42....that's what I'd use.

PS: I now see that the OP also listed conventional ST but I'd still go for the synthetic. I agree with the OP "that new/clean/budget gear oil is better than old/used/expensive gear oil."

Kira:
"Ha-ha, get it before we're forced onto the 'bitcoin standard"."

I really don't understand 'Bitcoin'....what's it backed by?
At least the dollar is backed by "the full faith and credit of The US Government".....not that that means much anymore.

 

[Jerrysends]

Bitcoin is backed by the full faith and credit of "Uncle Sam" Bankman-Fried.

 

[Rob_Roy]

Mystic 75w-90 is $9 per quart at Blains Farm and Fleet. Occasionally they have free shipping from their online store.

 

[goingplacesanddoingstuff]

Amsoil Severe Gear has tested out so much better than anything else besides HPL that I don’t see any reason to use anything else.

The difference for a diff fill is like $20, if that. I’ll spend that all day long to get lower diff temps and less wear.